<template>
  <div>
    <!-- 面包屑导航区域 breadcrumb ブレッドクラム separator セパレーター 分隔器-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意：只允许第三级分类设置相关参数"
        type="warning"
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab 标签页区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的模板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button 
            :type="infoType" 
            size="mini" 
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
          >
            添加参数
          </el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTabelData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag 
                  v-for="(item,index) in scope.row.attr_vals" 
                  :key="index"
                  closable
                  @close = "handleClose(index,scope.row)"
                >
                  {{item}}
                </el-tag>
                <!-- 增加tag标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button 
                  v-else 
                  class="button-new-tag" 
                  size="small" 
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引行 -->
            <el-table-column type="index" label="No"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button 
                  type="primary" 
                  size="mini" 
                  icon="el-icon-edit"
                  @click = "showEditDialog(scope.row.attr_id)"
                >修改</el-button
                >
                <el-button 
                  type="danger" 
                  size="mini" 
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的模板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button 
            :type="infoType" 
            size="mini" 
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
          >
            添加属性
          </el-button>
           <!-- 静态属性表格 -->
          <el-table :data="onlyTabelData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag 
                  v-for="(item,index) in scope.row.attr_vals" 
                  :key="index"
                  closable
                  @close = "handleClose(index,scope.row)"
                >
                  {{item}}
                </el-tag>
                <!-- 增加tag标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button 
                  v-else 
                  class="button-new-tag" 
                  size="small" 
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引行 -->
            <el-table-column type="index" label="No"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button 
                  type="primary" 
                  size="mini" 
                  icon="el-icon-edit"
                   @click = "showEditDialog(scope.row.attr_id)"
                >修改</el-button
                >
                <el-button 
                  type="danger" 
                  size="mini" 
                  icon="el-icon-delete"
                  @click ="removeParams(scope.row.attr_id)"
                >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>

        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close = "addDialogClose"
      >
      <el-form 
        :model="addForm" 
        :rules="addFormRules" 
        ref="addFormRef" 
        label-width="100px" 
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
       </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog
      :title="'修改'+titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close = "editDialogClose"
      >
      <el-form 
        :model="editForm" 
        :rules="editFormRules" 
        ref="editFormRef" 
        label-width="100px" 
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
       </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      infoType: 'info',
      // 商品分类列表
      cateList: [],
      // 级联选择框配置对象
      cateProps: {
        expandTrigger: 'click',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //   级联选择框双向绑定的数组
      selectedCateKeys: [],
      //   默认激活的标签页名称
      activeName: 'many',
      manyTabelData: [],
      onlyTabelData: [],
      addDialogVisible:false,
      editDialogVisible:false,
      addForm:{
        attr_name:''
      },
      editForm:{},
      // inputVisible:false,
      // inputValue:'',
      // 验证规则
      addFormRules:{
        attr_name:[
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
        ],
      },
      editFormRules:{
        attr_name:[
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
        ],
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取所有的商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表数据失败')
      }
      this.cateList = res.data
      //   console.log(this.cateList)
    },
    // 级联选择框选择发生变化触发此方法
    handleChange() {
      this.infoType = this.isBtnDisabled ? 'info' : 'primary'
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTabelData = []
        this.onlyTabelData = []
        return
      }
      this.getParamsData()
    },
    handleTabClick() {
      this.getParamsData()
      //   console.log(this.activeName)
    },
    // 获取数据
    async getParamsData() {
      // 根据所选分类的id和当前的模板名称获取数据
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName }
        }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('请求数据失败')
      }

      if (this.activeName === 'many') {
        //保存动态数据
        this.manyTabelData = res.data
      } else {
        //保存静态属性数据
        this.onlyTabelData = res.data
      }

      res.data.forEach( item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : []
        item.inputVisible = false
        item.inputValue = ''
      })
        console.log(res.data)
    },
    // 对话框关闭重置
    addDialogClose(){
      this.$refs.addFormRef.resetFields()
    },
    //  点击确定按钮
    addParams(){
      // 点击前的预验证
      this.$refs.addFormRef.validate(async valid => {
        // if(valid) return 
         const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
           attr_name:this.addForm.attr_name,
           attr_sel:this.activeName
         })
         if(res.meta.status !== 201){
            return this.$message.error("添加参数失败")
         }
         this.$message.success("添加参数成功")
         this.getParamsData();
         this.addDialogVisible = false;
         
      });
    },
    // 点击修改按钮
    async showEditDialog(attr_id){
      const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{
        params:{
           attr_sel:this.activeName,
        }
      })

      if(res.meta.status !== 200){
            return this.$message.error("获取参数失败")
      }
      this.editForm = res.data
       this.editDialogVisible = true;
    },
    editDialogClose(){
      this.$refs.editFormRef.resetFields()
    },
    editParams(){
      this.$refs.editFormRef.validate(async  valid => {
        if(!valid) return 
        const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
          attr_name:this.editForm.attr_name,
          attr_sel:this.activeName
        })

        if(res.meta.status !== 200){
            return this.$message.error("修改参数失败")
        }
         this.$message.success("修改参数成功")
         this.getParamsData();
         this.editDialogVisible = false;
      })
    },
    // 点击删除按钮
    async removeParams(attr_id){
         const confirmResuilt =await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch( err => err)
        // 取消删除操作
        if( confirmResuilt !=='confirm' ){
          return this.$message.info('已取消删除')
        } 
        //删除
        const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
        if(res.meta.status !== 200){
            return this.$message.error("删除参数失败")
        }
         this.$message.success("删除参数成功")
         this.getParamsData();
    },
    async handleInputConfirm(row){
      if(row.inputValue.trim().length === 0){
        row.inputValue = ''
        row.inputVisible = false;
        return 
      }
      //后续动作,添加新的tag
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false;
      // 调用函数保存数据
      this.saveAttrVals(row)
    },
    showInput(row){
        row.inputVisible = true;
        //让文本框自动获取焦点
        //$nextTick 方法的作用，就是当页面上元素被重新渲染之后，才会执行回调函数中的代码
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    handleClose(index,row){
      row.attr_vals.splice(index,1)
      this.saveAttrVals(row)
    },
    async saveAttrVals(row){      
      //发出请求保存本次的新增数据
      const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if(res.meta.status !== 200){
            return this.$message.error("修改参数失败")
        }
        this.$message.success("修改参数成功")
    }
  },
  computed: {
    //   按钮禁用的判断
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选择的三级分类ID
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText(){
      if(this.activeName == "many"){
        return "动态参数"
      }
      return "静态属性"
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag{
  margin: 5px;
}
.input-new-tag {
    width: 90px;
    margin-left: 5px;
  
  }
</style>
